package cn.com.jsepc.rep.upload;

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Iterator;
import java.util.List;
import java.util.UUID;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import net.sf.json.JSONObject;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;

public class Upload extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public Upload() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}


	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		doPost(request, response);
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		PrintWriter out = response.getWriter();
		String savePath = this.getServletConfig().getServletContext()
				.getRealPath("");
		savePath = savePath + "/excel/";
		File f1 = new File(savePath);  
		if (!f1.exists()) {
			f1.mkdirs();
		}
		DiskFileItemFactory fac = new DiskFileItemFactory();
		ServletFileUpload upload = new ServletFileUpload(fac);
		upload.setHeaderEncoding("utf-8");
		List fileList = null;
		try {
			fileList = upload.parseRequest(request);
		} catch (FileUploadException ex) {
			return;
		}
		Iterator<FileItem> it = fileList.iterator();
		String name = "";
		String extName = "";
		while (it.hasNext()) {
	         
			FileItem item = it.next();
			if (!item.isFormField()) {
				name = item.getName();
				long size = item.getSize();
				String type = item.getContentType();
				if (name == null || name.trim().equals("")) {
					continue;
				}
				if (name.lastIndexOf(".") >= 0) {
					extName = name.substring(name.lastIndexOf("."));
				}
				File file = null;
				do {
					name = UUID.randomUUID().toString();
					file = new File(savePath + name + extName);
				} while (file.exists());
				File saveFile = new File(savePath + name + extName);
				try {
					item.write(saveFile);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		}
		  JSONObject json = new JSONObject(); 
		  json.put("success", "true");
		  json.put("url",savePath+name + extName );
		response.getWriter().print(json.toString());
		System.out.println(json.toString());
	}

	/**
	 * Returns information about the servlet, such as 
	 * author, version, and copyright. 
	 *
	 * @return String information about this servlet
	 */
	public String getServletInfo() {
		return "This is my default servlet created by Eclipse";
	}

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occurs
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}
